diff --git a/Source/DSP/PitchDetection/Notes.h b/Source/DSP/PitchDetection/Notes.h
index 9dfe7c7..229ff2a 100644
--- a/Source/DSP/PitchDetection/Notes.h
+++ b/Source/DSP/PitchDetection/Notes.h
@@ -9,6 +9,7 @@
 #include <cmath>
 #include <vector>
 #include <assert.h>
+#include <algorithm>
 
 #include "BasicPitchConstants.h"